Marshall Locking Post Mount Mailbox, Black

Model #MLM16KB1

– Concealed locking compartment protects mail from theft
– Rust-resistant galvanized steel construction
– Magnetic latch keeps door securely closed
– Two keys provided for access to delivered mail
– Internal mail clip for outgoing mail included
– Aluminum outgoing mail flag
– Mounting hardware sold separately



The Marshall mailbox keeps your mail secure behind durable, galvanized steel constructed walls. This large, locking mailbox restricts access to delivered mail within a concealed locking compartment. The Marshall assists in preventing theft and vandalism by featuring a sturdy cam lock with two keys for access to mail. The delivery mail slot measures at 1.75 inches tall and 10 inches wide to allow deposits of letters, magazines and newspapers. A mail clip is fastened to the interior door and is designed for placing outgoing mail deliveries. In addition, a magnetic closure keeps the door securely in place when not in use. The Marshall comes fully assembled and is compatible with most mailbox posts. Match with any Gibraltar Mailboxes post with the designation letter code C to ensure compatibility. Mounting hardware and post are sold separately.

Additional information

Access Type

Color Family

Mailbox Material

Compatibility Code




11.8" H x 11.7" W x 20.0" D


10 lbs.


1475 cubic in.


90 Day Limited

Compatible with These Posts

Marshall Locking Post Mount Mailbox, Black, MLM16KB1